Retirement Plans: SEP IRA vs Solo 401(k)
Compare retirement plan options for small business owners, including SEP IRAs, solo 401(k)s, payroll readiness, contribution planning, and bookkeeping records.
This guide is educational and is not tax, legal, investment, or retirement plan advice. Confirm eligibility, limits, deadlines, and filings with qualified advisors.
Short answer
Common retirement plan options for owners include SEP IRAs, solo 401(k)s, SIMPLE IRAs, and employer 401(k) plans. The right fit depends on employees, cash flow, contribution goals, payroll setup, administrative work, and tax advice.
Checklist
- Confirm whether the business has eligible employees besides the owner and spouse.
- Estimate owner compensation or self-employment income before setting contribution targets.
- Compare contribution flexibility, setup deadlines, annual filings, and employee requirements.
- Keep plan contributions separate from owner draws and ordinary expenses.
- Coordinate with a tax advisor and retirement plan provider before funding a plan.
Common mistakes
- Choosing a plan based only on the highest possible contribution limit.
- Ignoring employee eligibility and required contributions.
- Recording contributions without enough tax-prep detail.
- Waiting until year end to ask what plan can still be opened or funded.
Examples for service businesses
- A solo consultant may compare SEP IRA simplicity with solo 401(k) flexibility.
- An S corp owner needs clean payroll records because wages can affect retirement planning.
- A landscaping company with employees should understand eligibility before assuming an owner-only plan works.
The main retirement plan options
Owners often compare SEP IRAs, solo 401(k)s, SIMPLE IRAs, and traditional employer 401(k) plans. Each option has different setup rules, contribution mechanics, administrative duties, and employee considerations.
The IRS notes that self-employed people have many of the same tax-deferred retirement saving options as employees in company plans.
SEP IRA vs solo 401(k)
A SEP IRA is often attractive because it can be simpler to administer. A solo 401(k) may offer different contribution mechanics for eligible owner-only businesses, but it can involve more administration.
The best choice depends on income, employees, plan features, cash flow, and advisor guidance.
Why bookkeeping matters
Retirement planning needs clean income, payroll, and owner activity records. If owner draws, wages, distributions, and contributions are mixed together, tax planning becomes harder.
Bring year-to-date financials, payroll reports, owner pay detail, employee information, and cash flow expectations to advisor conversations.
Review Owner Pay and Retirement Records
Sabillon Advisory can organize owner pay, payroll, and contribution records so your tax professional and plan advisor have cleaner numbers.
Review Owner Pay and Retirement RecordsRelated resources
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